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Revolutionizing immune research with organoid-based co-culture and chip systems. 利用类器官共培养和芯片系统革新免疫研究。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-09-16 DOI: 10.1093/cei/uxae004
Diana Papp, Tamas Korcsmaros, Isabelle Hautefort

The intertwined interactions various immune cells have with epithelial cells in our body require sophisticated experimental approaches to be studied. Due to the limitations of immortalized cell lines and animal models, there is an increasing demand for human in vitro model systems to investigate the microenvironment of immune cells in normal and in pathological conditions. Organoids, which are self-renewing, 3D cellular structures that are derived from stem cells, have started to provide gap-filling tissue modelling solutions. In this review, we first demonstrate with some of the available examples how organoid-based immune cell co-culture experiments can advance disease modelling of cancer, inflammatory bowel disease, and tissue regeneration. Then, we argue that to achieve both complexity and scale, organ-on-chip models combined with cutting-edge microfluidics-based technologies can provide more precise manipulation and readouts. Finally, we discuss how genome editing techniques and the use of patient-derived organoids and immune cells can improve disease modelling and facilitate precision medicine. To achieve maximum impact and efficiency, these efforts should be supported by novel infrastructures such as organoid biobanks, organoid facilities, as well as drug screening and host-microbe interaction testing platforms. All these together or in combination can allow researchers to shed more detailed, and often patient-specific, light on the crosstalk between immune cells and epithelial cells in health and disease.

人体内各种免疫细胞与上皮细胞之间的相互作用相互交织,需要采用复杂的实验方法进行研究。由于永生细胞系和动物模型的局限性,人们越来越需要人体体外模型系统来研究免疫细胞在正常和病理情况下的微环境。由干细胞衍生的可自我更新的三维细胞结构--有机体,已开始提供填补空白的组织建模解决方案。在这篇综述中,我们首先用一些现有的例子来说明基于类器官的免疫细胞共培养实验如何推进癌症、炎症性肠病和组织再生的疾病建模。然后,我们认为,为了实现复杂性和规模化,片上器官模型与基于微流控技术的尖端技术相结合,可以提供更精确的操作和读数。最后,我们将讨论基因组编辑技术以及使用源自患者的器官组织和免疫细胞如何改善疾病模型并促进精准医疗。为了实现最大的影响和效率,这些工作应得到新型基础设施的支持,如类器官生物库、类器官设施以及药物筛选和宿主-微生物相互作用测试平台。所有这些共同或结合在一起,可以让研究人员更详细地了解免疫细胞和上皮细胞在健康和疾病中的相互作用,而且往往是针对特定病人的。
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引用次数: 0
Organoids as a tool to study homeostatic and pathological immune-epithelial interactions in the gut. 将器官组织作为研究肠道内免疫-上皮相互作用的稳态和病态的工具。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-09-16 DOI: 10.1093/cei/uxad118
Emma Højmose Kromann, Ainize Peña Cearra, Joana F Neves

The intestine hosts the largest immune cell compartment in the body as a result of its continuous exposure to exogenous antigens. The intestinal barrier is formed by a single layer of epithelial cells which separate immune cells from the gut lumen. Bidirectional interactions between the epithelium and the immune compartment are critical for maintaining intestinal homeostasis by limiting infection, preventing excessive immune activation, and promoting tissue repair processes. However, our understanding of epithelial-immune interactions incomplete as the complexity of in vivo models can hinder mechanistic studies, cell culture models lack the cellular heterogeneity of the intestine and when established from primary cell can be difficult to maintain. In the last decade, organoids have emerged as a reliable model of the intestine, recapitulating key cellular and architectural features of native tissues. Herein, we provide an overview of how intestinal organoids are being co-cultured with immune cells leading to substantial advances in our understanding of immune-epithelial interactions in the gut. This has enabled new discoveries of the immune contribution to epithelial maintenance and regeneration both in homeostasis and in disease such as chronic inflammation, infection and cancer. Organoids can additionally be used to generate immune cells with a tissue-specific phenotype and to investigate the impact of disease associated risk genes on the intestinal immune environment. Accordingly, this review demonstrates the multitude of applications for intestinal organoids in immunological research and their potential for translational approaches.

肠道是人体内最大的免疫细胞区,因为它不断接触外源抗原。肠道屏障由单层上皮细胞构成,将免疫细胞与肠腔隔开。上皮细胞和免疫细胞之间的双向互动对于通过限制感染、防止过度免疫激活和促进组织修复过程来维持肠道平衡至关重要。然而,由于体内模型的复杂性会阻碍机理研究,细胞培养模型缺乏肠道细胞的异质性,而且从原代细胞建立的模型可能难以维持,因此我们对上皮与免疫相互作用的了解并不全面。近十年来,器官组织已成为一种可靠的肠道模型,它再现了原生组织的关键细胞和结构特征。在这里,我们将概述肠道器官组织如何与免疫细胞共同培养,从而使我们对肠道免疫上皮相互作用的理解取得重大进展。这使我们对免疫对上皮维持和再生的贡献有了新的发现,无论是在体内平衡还是在慢性炎症、感染和癌症等疾病中。此外,器官组织还可用于生成具有组织特异性表型的免疫细胞,并研究疾病相关风险基因对肠道免疫环境的影响。因此,本综述展示了肠道器官组织在免疫学研究中的多种应用及其转化方法的潜力。
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引用次数: 0
Exploring S100A8/A9, neopterin, and MMP3 in familial Mediterranean fever. 探索家族性地中海热中的 S100A8/A9、Neopterin 和 MMP3。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-09-16 DOI: 10.1093/cei/uxae049
Ozgur C Kilinc, Yonca S Akdeniz, Zuleyha Taskin, Mehmet Karabulut, Arif Kaya, Ibrahim Murat Bolayırlı, Gunay Can, Serdal Ugurlu

Familial Mediterranean fever (FMF) is characterized by inflammatory attacks due to overactivation of pyrin inflammasome. This study aimed to investigate the reliability of S100A8/A9, neopterin, and matrix metalloproteinase 3 (MMP3) at monitoring subclinical inflammation and disease activity, and at differentiating FMF attacks from appendicitis, the most common misdiagnosis among FMF patients. Blood samples (n = 75), comprising from FMF patients during an attack (n = 20), the same FMF patients during the attack-free period (n = 14), patients with appendicitis (n = 24), and healthy volunteers (n = 17) were obtained. Duplicate determinations of S100A8/A9, neopterin, and MMP-3 levels were conducted using the enzyme-linked immunosorbent assay (ELISA). FMF patients with and without attack and patients with appendicitis had significantly elevated S100A8/A9 levels compared to healthy volunteers (P-values: < 0.001, 0.036, 0.002, respectively). Patients with appendicitis and FMF patients with and without attack had significantly increased serum neopterin levels compared to healthy volunteers (P-value: < 0.001). MMP3 levels were significantly higher among patients with appendicitis and FMF patients during attack compared to healthy controls (P-values: < 0.001, 0.001). Serum levels of S100A8/A9, neopterin, and MMP3 were increased significantly during attacks compared to attack-free periods among FMF patients (P-values: 0.03, 0.047, 0.007). S100A8/A9 emerges as a valuable marker for monitoring disease activity. Neopterin and S100A8/A9 might help physicians to monitor subclinical inflammation during the attack-free periods of FMF patients. MMP3 might aid in diagnosing FMF attacks when distinguishing between attack and attack-free periods is challenging.

家族性地中海热(FMF)的特征是由于蝶呤炎性体过度激活而导致炎症发作。本研究旨在探讨 S100A8/A9、蝶呤和基质金属蛋白酶 3 (MMP3) 在监测亚临床炎症和疾病活动以及区分 FMF 发作与阑尾炎(FMF 患者中最常见的误诊)方面的可靠性。研究人员采集了血样(75 人份),包括 FMF 患者发作期血样(20 人份)、同一 FMF 患者无发作期血样(14 人份)、阑尾炎患者血样(24 人份)和健康志愿者血样(17 人份)。使用酶联免疫吸附试验(ELISA)对 S100A8/A9、新蝶呤和 MMP-3 水平进行了重复测定。与健康志愿者相比,有发作和无发作的 FMF 患者以及阑尾炎患者的 S100A8/A9 水平明显升高(p 值:0.05):
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引用次数: 0
Tim-4 alleviates acute hepatic injury by modulating homeostasis and function of NKT cells. Tim-4 通过调节 NKT 细胞的稳态和功能减轻急性肝损伤。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-09-16 DOI: 10.1093/cei/uxae063
Yingchun Wang, Yuzhen Wang, Yutong Ge, Zhuanchang Wu, Xuetian Yue, Chunyang Li, Xiaohong Liang, Chunhong Ma, Pin Wang, Lifen Gao

T-cell immunoglobulin and mucin domain-containing molecule 4 (Tim-4) is an immune checkpoint molecule, which involves in numerous inflammatory diseases. Tim-4 is mainly expressed on antigen-presenting cells. However, increasing evidence has shown that Tim-4 is also expressed on natural killer T (NKT) cells. The role of Tim-4 in maintaining NKT cell homeostasis and function remains unknown. In this study, we explored the effect of Tim-4 on NKT cells in acute liver injury. This study found that Tim-4 expression on hepatic NKT cells was elevated during acute liver injury. Tim-4 deficiency enhanced IFN-γ, TNF-α expression while impaired IL-4 production in NKT cells. Loss of Tim-4 drove NKT-cell effector lineages to be skewed to NKT1 subset. Furthermore, Tim-4 KO mice were more susceptible to α-Galactosylceramide (α-GalCer) challenge. In conclusion, our findings indicate that Tim-4 plays an important role in regulating homeostasis and function of NKT cells in acute liver injury. Therefore, Tim-4 might become a new regulator of NKT cells and a potential target for the therapy of acute hepatitis.

含 T 细胞免疫球蛋白和粘蛋白结构域的分子 4(Tim-4)是一种免疫检查点分子,与多种炎症性疾病有关。Tim-4 主要在抗原呈递细胞上表达。然而,越来越多的证据表明,Tim-4 也在自然杀伤 T(NKT)细胞上表达。Tim-4 在维持 NKT 细胞稳态和功能方面的作用仍然未知。本研究探讨了 Tim-4 对急性肝损伤中 NKT 细胞的影响。研究发现,在急性肝损伤期间,肝NKT细胞上的Tim-4表达升高。Tim-4缺乏会增强NKT细胞中IFN-γ、TNF-α的表达,同时影响IL-4的产生。Tim-4的缺失导致NKT细胞效应系向NKT1亚群倾斜。此外,Tim-4 KO 小鼠更容易受到 α-GalCer 的挑战。总之,我们的研究结果表明,Tim-4 在调节急性肝损伤中 NKT 细胞的平衡和功能方面发挥着重要作用。因此,Tim-4可能成为NKT细胞新的调节因子和治疗急性肝炎的潜在靶点。
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引用次数: 0
Beta-adrenergic stimulation promotes an endoplasmic reticulum stress-dependent inflammatory program in salivary gland epithelial cells. β-肾上腺素能刺激可促进唾液腺上皮细胞内质网应激依赖性炎症程序。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-09-16 DOI: 10.1093/cei/uxae054
Kalliopi Moustaka, Athanasios Stergiopoulos, Roxane Tenta, Sophia Havaki, Stergios Katsiougiannis, Fotini N Skopouli

The effect of beta-adrenergic stimulation on human labial minor salivary gland epithelial cells (LMSGEC) on IL-6 production and its dependency on endoplasmic reticulum (ER) stress were investigated. Primary LMSGEC from Sjögren's syndrome (SS) patients and controls in culture were stimulated with epinephrine and IL-6 expression was evaluated by qPCR and ELISA. The expression of β-ARs in cultured LMSGEC was tested by qPCR, while adrenoceptors and cAMP levels were examined in LMSGs by immunofluorescence. ER evaluation was performed by transmission electron microscopy (TEM) and ER stress by western blot. Epinephrine-induced IL-6 production by cultured LMSGEC was evaluated after alleviation of the ER stress by applying tauroursodeoxycholic acid (TUDCA) and silencing of PKR-like ER kinase (PERK) and activating transcription factor 4 (ATF4) RNAs. Expression of IL-6 by LMSGEC was upregulated after β-adrenergic stimulation, while the silencing of adrenoreceptors downregulated IL-6. The amelioration of ER stress, as well as the silencing of PERK/ATF4, prevented epinephrine-induced upregulation of IL-6. Adrenergic stimulation led to higher and sustained IL-6 levels secreted by LMSGEC of SS patients compared to controls. Adrenergic signaling was endogenously enhanced in LMSGEC of SS patients (expression of β-ARs in situ, intracellular cAMP in cultured LMSGEC). In parallel, SS-LMSGEC expressed dilated ER (TEM) and higher levels of GRP78/BiP. PERK/ATF4 pathway of the ER stress emerged as a considerable mediator of adrenergic stimulation for IL-6 production by the LMSGEC. An enhanced endogenous adrenergic activation and a stressed ER observed in SS-LMSGEC may contribute to a sustained IL-6 production by these cells after adrenergic stimulation.

研究了β-肾上腺素能刺激人唇小唾液腺上皮细胞(LMSGEC)对IL-6产生的影响及其与内质网(ER)应激的依赖关系。用肾上腺素刺激斯约格伦综合征(SS)患者和对照组培养的原代小唾液腺上皮细胞,并用 qPCR 和 ELISA 评估 IL-6 的表达。通过 qPCR 检测了培养的 LMSGEC 中 β-ARs 的表达,同时通过免疫荧光检测了 LMSG 中肾上腺素受体和 cAMP 的水平。透射电子显微镜(TEM)对ER进行了评估,Western印迹对ER应激进行了检测。在应用牛磺脱氧胆酸(TUDCA)和沉默 PKR 样 ER 激酶(PERK)和激活转录因子 4(ATF4)RNA 缓解 ER 压力后,评估了肾上腺素能诱导培养的 LMSGEC 产生的 IL-6。LMSGEC在受到β肾上腺素能刺激后IL-6的表达上调,而沉默肾上腺素受体则会下调IL-6的表达。ER应激的改善以及PERK/ATF4的沉默阻止了肾上腺素诱导的IL-6上调。与对照组相比,肾上腺素能刺激导致 SS 患者的 LMSGEC 分泌出更高且持续的 IL-6 水平。在 SS 患者的 LMSGEC 中,肾上腺素能信号传导内源性增强(β-ARs 原位表达、培养的 LMSGEC 细胞内 cAMP)。同时,SS-LMSGEC 表达扩张的 ER(TEM)和更高水平的 GRP78/BiP。ER应激的PERK/ATF4通路成为肾上腺素刺激LMSGEC产生IL-6的重要介质。在 SS-LMSGEC 中观察到的内源性肾上腺素能激活增强和ER受压可能有助于这些细胞在肾上腺素能刺激后持续产生 IL-6。
{"title":"Beta-adrenergic stimulation promotes an endoplasmic reticulum stress-dependent inflammatory program in salivary gland epithelial cells.","authors":"Kalliopi Moustaka, Athanasios Stergiopoulos, Roxane Tenta, Sophia Havaki, Stergios Katsiougiannis, Fotini N Skopouli","doi":"10.1093/cei/uxae054","DOIUrl":"10.1093/cei/uxae054","url":null,"abstract":"<p><p>The effect of beta-adrenergic stimulation on human labial minor salivary gland epithelial cells (LMSGEC) on IL-6 production and its dependency on endoplasmic reticulum (ER) stress were investigated. Primary LMSGEC from Sjögren's syndrome (SS) patients and controls in culture were stimulated with epinephrine and IL-6 expression was evaluated by qPCR and ELISA. The expression of β-ARs in cultured LMSGEC was tested by qPCR, while adrenoceptors and cAMP levels were examined in LMSGs by immunofluorescence. ER evaluation was performed by transmission electron microscopy (TEM) and ER stress by western blot. Epinephrine-induced IL-6 production by cultured LMSGEC was evaluated after alleviation of the ER stress by applying tauroursodeoxycholic acid (TUDCA) and silencing of PKR-like ER kinase (PERK) and activating transcription factor 4 (ATF4) RNAs. Expression of IL-6 by LMSGEC was upregulated after β-adrenergic stimulation, while the silencing of adrenoreceptors downregulated IL-6. The amelioration of ER stress, as well as the silencing of PERK/ATF4, prevented epinephrine-induced upregulation of IL-6. Adrenergic stimulation led to higher and sustained IL-6 levels secreted by LMSGEC of SS patients compared to controls. Adrenergic signaling was endogenously enhanced in LMSGEC of SS patients (expression of β-ARs in situ, intracellular cAMP in cultured LMSGEC). In parallel, SS-LMSGEC expressed dilated ER (TEM) and higher levels of GRP78/BiP. PERK/ATF4 pathway of the ER stress emerged as a considerable mediator of adrenergic stimulation for IL-6 production by the LMSGEC. An enhanced endogenous adrenergic activation and a stressed ER observed in SS-LMSGEC may contribute to a sustained IL-6 production by these cells after adrenergic stimulation.</p>","PeriodicalId":10268,"journal":{"name":"Clinical and experimental immunology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11404117/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141442178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tubulin beta 5 is not the target of antineutrophil antibodies in primary sclerosing cholangitis. 原发性硬化性胆管炎患者的抗中性粒细胞抗体并非以β5管壁蛋白为靶标。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-09-16 DOI: 10.1093/cei/uxae053
Johannes R Hov, Øyvind Molberg, Tom H Karlsen
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引用次数: 0
Amlexanox targeted inhibition of TBK1 regulates immune cell function to exacerbate DSS-induced inflammatory bowel disease. Amlexanox靶向抑制TBK1可调节免疫细胞功能,从而加剧DSS诱发的炎症性肠病。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-09-09 DOI: 10.1093/cei/uxae082
Lu Hui, Meng-Ke Huang, Qing-Kai Dai, Cheng-Lin Miao, Yun-Long Yang, Chen-Xi Liu, Ting Liu, Yong-Mei Jiang

Amlexanox (ALX) is a small molecule drug for the treatment of inflammatory, autoimmune, metabolic and tumor diseases. At present, there are no studies on whether ALX has a therapeutic effect on inflammatory bowel disease (IBD). In this study, we used a mouse model of dextran sulfate sodium (DSS)-induced colitis to investigate the effect of ALX targeted inhibition of TBK1 on colitis. We found that the severity of colitis in mice was correlated with TBK1 expression. Notably, although ALX inhibited the activation of the TBK1-NF-κB/TBK1-IRF3 pro-inflammatory signaling pathway, it exacerbated colitis and reduced survival in mice. The results of drug safety experiments ruled out a relationship between this exacerbating effect and drug toxicity. In addition, ELISA results showed that ALX promoted the secretion of IL-1β and IFN-α, and inhibited the production of cytokines IL-6, TNF-α, IL-10, TGF-β and secretory IgA. Flow cytometry results further showed that ALX promoted T cell proliferation, activation and differentiation, and thus played a pro-inflammatory role; Also, ALX inhibited the generation of dendritic cells and the polarization of macrophages to M1 type, thus exerting anti-inflammatory effect. These data suggest that the regulation of ALX on the function of different immune cells is different, so the effect on the inflammatory response is bidirectional. In conclusion, our study demonstrates that simply inhibiting TBK1 in all immune cells is not effective for the treatment of colitis. Further investigation the anti-inflammatory mechanism of ALX on dendritic cells and macrophages may provide a new strategy for the treatment of IBD.

Amlexanox(ALX)是一种治疗炎症、自身免疫、代谢和肿瘤疾病的小分子药物。目前,还没有关于 ALX 是否对炎症性肠病(IBD)有治疗作用的研究。在这项研究中,我们利用葡聚糖硫酸钠(DSS)诱导的小鼠结肠炎模型,研究了 ALX 靶向抑制 TBK1 对结肠炎的影响。我们发现,小鼠结肠炎的严重程度与 TBK1 的表达相关。值得注意的是,虽然ALX抑制了TBK1-NF-κB/TBK1-IRF3促炎信号通路的激活,但却加剧了结肠炎并降低了小鼠的存活率。药物安全性实验结果排除了这种加剧效应与药物毒性之间的关系。此外,酶联免疫吸附试验结果表明,ALX 能促进 IL-1β 和 IFN-α 的分泌,抑制细胞因子 IL-6、TNF-α、IL-10、TGF-β 和分泌型 IgA 的产生。流式细胞术结果进一步表明,ALX能促进T细胞的增殖、活化和分化,从而起到促炎作用;ALX还能抑制树突状细胞的生成和巨噬细胞向M1型的极化,从而起到抗炎作用。这些数据表明,ALX 对不同免疫细胞功能的调控是不同的,因此对炎症反应的影响是双向的。总之,我们的研究表明,单纯抑制所有免疫细胞中的 TBK1 并不能有效治疗结肠炎。进一步研究 ALX 对树突状细胞和巨噬细胞的抗炎机制可能会为 IBD 的治疗提供新的策略。
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引用次数: 0
Antibody profiles in the mosaic of "seronegative" APS syndrome. 血清阴性 "APS 综合征的抗体谱。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-08-28 DOI: 10.1093/cei/uxae079
Simona Truglia, Gloria Riitano, Silvia Mancuso, Serena Recalchi, Luca Rapino, Cristina Garufi, Valeria Manganelli, Tina Garofalo, Roberta Misasi, Cristiano Alessandri, Maurizio Sorice, Agostina Longo, Fabrizio Conti, Antonella Capozzi

Clinical manifestations, as distinct from thrombotic and obstetric morbidity, were recently included in the update of classification criteria of the antiphospholipid syndrome (APS). However, the existence of several patients with clinical manifestations suggestive of APS, but negative for criteria antiphospholipid antibodies (aPLs) [anti-cardiolipin antibodies (aCL), anti-β2-glycoprotein I antibodies (aβ2-GPI) and lupus anticoagulant] may suggest an update of diagnostic criteria. In this study, we analyzed the prevalence of six non-criteria aPLs in a large monocentric cohort of patients with seronegative APS (SN-APS), to investigate their possible diagnostic role. aCL IgA, aβ2-GPI IgA and aβ2-GPI Domain 1 antibodies were detected by chemiluminescence, anti-phosphatidylserine/prothrombin (aPS/PT) IgG, anti-vimentin/cardiolipin (aVim/CL) IgG and anti-carbamylated-β2-glycoprotein I (aCarb-β2-GPI) IgG by ELISA in sera from 144 SN-APS patients. In SN-APS patients, aCL IgA were detected in 4/144 (2.77%), aβ2-GPI IgA in 2/144 (1.39%), aβ2-GPI-Domain 1 in 1/144 (0.69%), aPS/PT in 16/144 (11.11%), aVim/CL in 37/144 (25.69%) and aCarb-β2-GPI in 43/144 patients (29.86%). Patients negative for all non-criteria aPL assays were 77/144 (53.47%). Notably, the Venn diagram showed that aCarb-β2-GPI together with aVim/CL represented the prevalent combination of positive antibodies. In SN-APS patients, aCL IgA were associated with recurrent thrombosis (OR11.48; p=0.03); in obstetric SN-APS patients, aPS/PT were significantly associated with foetal deaths (OR4.84; p=0.01), aVim/CL with spontaneous abortions (OR2.71; p=0.016). This study indicates that aPS/PT, aVim/CL and aCarb-β2-GPI antibodies may represent useful tools to identify "seronegative" APS patients, who are negative for criteria aPLs, supporting the need to make testing for non-criteria aPLs more accessible in patients with SN-APS.

最近,抗磷脂综合征(APS)分类标准的更新包括了有别于血栓和产科发病的临床表现。然而,一些临床表现提示有 APS,但抗磷脂抗体(aPLs)[抗心磷脂抗体(aCL)、抗β2-糖蛋白 I 抗体(aβ2-GPI)和狼疮抗凝物]阴性的患者的存在可能提示诊断标准的更新。在本研究中,我们分析了血清阴性 APS(SN-APS)患者大型单中心队列中六种非标准 aPL 的流行率,以研究它们可能在诊断中的作用。化学发光法检测了 144 名 SN-APS 患者血清中的 aCL IgA、aβ2-GPI IgA 和 aβ2-GPI Domain 1 抗体,ELISA 法检测了抗磷脂酰丝氨酸/凝血酶原(aPS/PT)IgG、抗波形蛋白/心磷脂(aVim/CL)IgG 和抗氨甲酰化-β2-糖蛋白 I(aCarb-β2-GPI)IgG。在 SN-APS 患者中,4/144(2.77%)人检测到 aCL IgA,2/144(1.39%)人检测到 aβ2-GPI IgA,1/144(0.69%)人检测到 aβ2-GPI-Domain1,16/144(11.11%)人检测到 aPS/PT,37/144(25.69%)人检测到 aVim/CL,43/144(29.86%)人检测到 aCarb-β2-GPI。所有非标准 aPL 检测结果均为阴性的患者有 77/144 人(53.47%)。值得注意的是,维恩图显示,aCarb-β2-GPI 和 aVim/CL 是阳性抗体的主要组合。在 SN-APS 患者中,aCL IgA 与复发性血栓形成相关(OR11.48;p=0.03);在产科 SN-APS 患者中,aPS/PT 与胎儿死亡显著相关(OR4.84;p=0.01),aVim/CL 与自然流产相关(OR2.71;p=0.016)。这项研究表明,aPS/PT、aVim/CL 和 aCarb-β2-GPI 抗体可能是识别 "血清阴性 "APS 患者(标准 aPLs 阴性)的有用工具,这支持了让 SN-APS 患者更容易接受非标准 aPLs 检测的必要性。
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引用次数: 0
Unveiling Immunological Signatures and Predictors of Response to Immunosuppressive Therapy in Acquired Aplastic Anaemia". 揭示获得性再生障碍性贫血的免疫学特征和免疫抑制疗法反应的预测因素"。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-08-13 DOI: 10.1093/cei/uxae076
Maya Gupta, Chandrakala S, Baburao Vundinti, Amrutha Jose, Shashank Tiwari, Amiya Bhowmick, Manisha Madkaikar

Acquired Aplastic Anaemia (AA) often results from immune destruction of hematopoietic stem and progenitor cells. However, only 60-70% of patients with AA respond to immunosuppressive therapy (IST). There is lack of strong predictive marker for response to IST which can help therapy. Our study sought to pinpoint unique immune markers in AA patients and validate established predictors for response to IST. We enrolled 51 severe AA patients and analyzed 57 immunological parameters via flow cytometry. Additionally, we measured paroxysmal nocturnal hemoglobinuria (PNH) clone, telomere length, and thrombopoietin (TPO) levels prior to IST. After a 6-months follow-up, response was observed. Patients with AA had a distinct immunological signature characterized by absolute lymphopenia, skewed CD4/CD8 ratio with expansion of CD8 T cells with activated and senescent phenotype. Treg counts were reduced, while proportion of Treg A and B was comparable to controls. Treatment response was correlated with elevated Absolute Neutrophil Count (ANC), Absolute Reticulocyte Count (ARC), and reduced CD57+ CD8+ naive cells and B cell % before therapy. However, predictors like TPO, telomere length, and PNH did not emerge as indicators of treatment response. Identifying predictors for treatment response in AA is challenging due to abnormal haematopoiesis, genetic mutations, and treatment variables.

获得性再生障碍性贫血(AA)通常是造血干细胞和祖细胞遭到免疫破坏所致。然而,只有60-70%的再生障碍性贫血患者对免疫抑制疗法(IST)有反应。目前还缺乏有助于治疗的强效免疫抑制疗法反应预测标志物。我们的研究旨在确定 AA 患者的独特免疫标记物,并验证已建立的 IST 反应预测指标。我们招募了 51 名重症 AA 患者,并通过流式细胞术分析了 57 项免疫学参数。此外,我们还测量了 IST 前阵发性夜间血红蛋白尿(PNH)克隆、端粒长度和血小板生成素(TPO)水平。经过 6 个月的随访,观察到了反应。AA患者具有独特的免疫学特征,表现为绝对淋巴细胞减少、CD4/CD8比例失调、具有活化和衰老表型的CD8 T细胞扩增。Treg数量减少,而Treg A和B的比例与对照组相当。治疗反应与治疗前绝对中性粒细胞计数(ANC)和绝对网织红细胞计数(ARC)升高、CD57+ CD8+ 幼稚细胞和 B 细胞比例降低有关。然而,TPO、端粒长度和 PNH 等预测指标并未成为治疗反应的指标。由于造血异常、基因突变和治疗变量,确定 AA 治疗反应的预测指标具有挑战性。
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引用次数: 0
Multi-dimensional analysis of B cells reveals the expansion of memory and regulatory B cell clusters in humans living in rural tropical areas. 对 B 细胞的多维分析揭示了生活在热带农村地区的人类记忆性和调节性 B 细胞集群的扩张。
IF 3.4 3区 医学 Q3 IMMUNOLOGY Pub Date : 2024-08-12 DOI: 10.1093/cei/uxae074
Mathilde A M Chayé, Oscar R J van Hengel, Astrid L Voskamp, Arifa Ozir-Fazalalikhan, Marion H König, Koen A Stam, Mikhael D Manurung, Yoanne D Mouwenda, Yvonne A Aryeetey, Agnes Kurniawan, Yvonne C M Kruize, Erliyani Sartono, Anne-Marie Buisman, Maria Yazdanbakhsh, Tamar Tak, Hermelijn H Smits

B-cells play a critical role in the formation of immune responses against pathogens by acting as antigen-presenting cells, by modulating immune responses and by generating immune memory and antibody responses. Here, we studied B-cell subset distributions between regions with higher and lower microbial exposure, i.e. by comparing peripheral blood B-cells from people living in Indonesia or Ghana to those from healthy Dutch residents using a 36-marker mass cytometry panel. By applying an unbiased multidimensional approach, we observed differences in the balance between the naïve and memory compartments, with higher CD11c+ and double negative (DN-IgDnegCD27neg) memory (M)B-cells in individuals from rural tropical areas, and conversely lower naïve B-cells compared to residents from an area with less pathogen exposure. Furthermore, characterization of total B-cell populations, CD11c+, DN and Breg cells showed the emergence of specific memory clusters in individuals living in rural tropical areas. Some of these differences were more pronounced in children compared to adults and suggest that a higher microbial exposure accelerates memory B cell formation, which 'normalizes' with age.

B 细胞通过充当抗原递呈细胞、调节免疫反应以及产生免疫记忆和抗体反应,在形成针对病原体的免疫反应中发挥着至关重要的作用。在这里,我们研究了微生物暴露程度较高和较低的地区之间的 B 细胞亚群分布情况,即使用 36 标记的质控细胞仪面板,将印度尼西亚或加纳居民的外周血 B 细胞与健康荷兰居民的外周血 B 细胞进行比较。通过采用一种无偏多维方法,我们观察到幼稚细胞和记忆细胞之间的平衡存在差异,来自热带农村地区的人体内CD11c+和双阴性(DN-IgDnegCD27neg)记忆(M)B细胞较高,相反,与来自病原体接触较少地区的居民相比,幼稚B细胞较低。此外,对总 B 细胞群、CD11c+、DN 和 Breg 细胞的特征分析表明,热带农村地区的居民出现了特定的记忆集群。其中一些差异在儿童身上比在成人身上更为明显,这表明较高的微生物暴露会加速记忆 B 细胞的形成,而这种形成会随着年龄的增长而 "正常化"。
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引用次数: 0
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Clinical and experimental immunology
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